16654474640437 has 2 divisors, whose sum is σ = 16654474640438. Its totient is φ = 16654474640436.

The previous prime is 16654474640317. The next prime is 16654474640471. The reversal of 16654474640437 is 73404647445661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15121412167876 + 1533062472561 = 3888626^2 + 1238169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16654474640437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16654474640497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8327237320218 + 8327237320219.

It is an arithmetic number, because the mean of its divisors is an integer number (8327237320219).

Almost surely, 2^{16654474640437} is an apocalyptic number.

It is an amenable number.

16654474640437 is a deficient number, since it is larger than the sum of its proper divisors (1).

16654474640437 is an equidigital number, since it uses as much as digits as its factorization.

16654474640437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162570240, while the sum is 61.

The spelling of 16654474640437 in words is "sixteen trillion, six hundred fifty-four billion, four hundred seventy-four million, six hundred forty thousand, four hundred thirty-seven".